Boiler dust door



R. WILL BOILER DUST noon June 19, 1928.

2 Sheets-Sheet l myEmoR I ATTORNEY 'WITNES -s June 19, 1928. 1,674,492 R. WILL I BOILER DUST noon Filed Nov. 23, 1926 2, Sheets-Sheet 2 2 a [a A I J A I I I W x I I I,

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. J INVENTOR I Rab ATTORNEY Patented June 19, 19 28. :f

nicnnran-w-riin or .NE X RK, N. Y.

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Application fiieii november'sza; 192s." Seria1.Nd."150, 367.

The present 'inve'ntion is concerned --With"' of an improved dustdoor conboilers; a. prime object of the the provision struction for I invention being to prevent the common fall ure of the brick work at this point'a'nd to' facilitate .the expeditiousrepairof the brickwork inmiediately adjacent the door in casefailure occurs.

In accordance with the present invention,

I actually simplify the construction at the door, render the door much more durable and efficient in use, and facilitate repairs when and if repairs are necessary." I

More general objects of the invention are to provide a simple, practical dust door construction, well suited to the requirements of economical installation and prolonged usage.

With the above noted and other objects in view, the invention consist-s in certain novel features of construction and combinations and arrangements of parts, as will be more fully hereinafter set forth and pointed out in the claims. The invention may be more fully understood from the following description in connection with the accompanying drawings, wherein- Fig. 1 is a fragmentary View partly in section and partly in outside elevation of a boiler embodying the present invention.

Fig. 2 is a fragmentary inside elevational view of the boiler.

Fig. 3 is an enlarged transverse sectional view on approximately the line 3'3 of Fig. 1.

Fig.4 is a top plan View of one of the improved blocks which I use to retain the door in position.

Fig. 5 isa front elevation of the block.

Fig. 6 is a transverse sectional View on the line 6-6 of Fig. 5.

In the drawings I have indicated at 10 j the conventional type of boiler having side walls 11 provided with dust doors indicated generally at 12. In Fig. 1 the details of the brick work which comprises the wall 11 have not been shown. Within the boiler there are mounted the usual headers 13 communicating with an inclined series of boiler tubes 14. Dust is blown from the tubes. at intervals by introducing an air nozzle through one of the openings 15 in the dust door.

As thus far described the device may be entirely conventional, the present invention being concerned more particularly with the provision of novel means for securely retain- 1mg the dust door-in place. 5 The sidewall 11 of the-boiler-which-is shown'in section in Fig. 3 includes an inner face of firebrick 16 and an outer face of ordinary brick 17, the brick Work being of any desiredthickness and providing a: tapering-pocketdS widest-wat the outer face of the wallall and con-; vergmg inwardly to the dust door 19.

The dust doo1-=-19 maybe of anyconvenient or conventional construction including" the usual side flanges r20 adapted to be embedded in the brick work and the usualclosures 21fortheopenings15. .A series of superimposed and preferably staggered blocks 22laid flush with the inner surface'of the i= firebrick lo are'provided fOZ"SGCLI1Gly locking the dust door in positidn. rBlocks T22 .aref formed With funnel-like openings 23 regisa tering with the openings 15, and each block is formed on one surface with a rib 24 adapted to interlock with a corresponding groove 25 in an adjacent block. The dust door 20 lies directly against the outer faces of the blocks 22 and one end of each block 22 is formed with a hook-shaped extension 26 which overlies the outer face of one edge v of'the dust door and cooperates with the body of the brick to define a pocket 27 receiving the edge of the dust door.

Preferable the blocks 22 are superimposed in-staggered relationwith each other; that is to say, the hooked extensions 26 projecting alternately from opposite sides of adjacent blocks, so that the door is snugly held against lateral displacement in either direction. By properly arranging the ribs and grooves, automatic accurate staggering of the blocks may be effected, these ribs and grooves being so arranged, that when the rib on top of one block enters a groove on a superimposed block, the extensions 26 at opposite ends of theblock will be properly spaced to receive the door.

The material 28 which forms the walls of. the pockets 18 may if desired, consist of fire clay which securely embeds the dust door which is within the recesses 27 of the blocks 22.

The blocks 22 may be made of any material which is found most suitable for the purpose. They may be in the nature of fireproof'tile or other generally similar mate rial. Preferably a block is associated with each opening in the door,'sothat the blocks are not cumbersome to handle and so that repair may be readily effected by tearing superimposed staggered blocks forming part of one brick side wall of the boiler, a dust door disposed against the outer faces of the blocks, portions projecting alternately from opposite sides of adjacent blocks and embracing opposite side edges of the door, the blocks having funnel shaped openings therein registering With the dust door openings and including interlocking means for positioning them. in properly staggered relation With the door edge embracing portions of adjacent blocks spaced the proper distance apart.

2. In a boiler construction, a brick side Wall structure arranged to provide a door opening, a dust door having a series of openings arranged in said door opening and a series of superimposed blocks forming part of the Wall structure having openings therein'registering with openings in the dust door, all of said blocks interlocking With superjacent and subjacent blocks, and the opposite ends of adjacent blocks including portions alternately interlocking With opposite edges of the door.

3. In a boiler construction, a brick side Wall structure. arranged to provide a door opening, a dust door having a series of openings arranged in said door opening and a series of superimposed blocks forming part of the wall structure having openings therein re isterin With 0 GDlD S in the dust door, said blocks being ribbed and grooved for interlocking With each other, and extensions projecting alternately from opposite ends of adjacent blocks defining channels receiving the edges of the door.

RICHARD WILL. 

